199 
“а common species on Ше tablelands, judging from the number of specimens sent home in collections. 
Prof. Sumichrast mentions it as an inhabitant of the alpine regions, and as common in the pinc- 
woods of the district of Orizaba. He obtained it all seasons at Moyoapam, a locality about 
8500 feet above the sea-level (Mem. Bost. Soc. N. Н. і. p. 542). Its presence in Guatemala is 
known from a single specimen obtained in December 1873, in the pine-forests of the Volcan de 
Fuego, at an elevation of about 11,000 feet above the sea. Whether the species is resident in this 
tract of forest or not, cannot at present be stated; but it is not improbable that it is to be found 
there, as near Orizaba, at all seasons. 16 is also almost sure to be met with in the upland ridges 
of the Guatemala Altos which stretch north-westwards to the Mexican frontier." 
The habits of T. auduboni seem to be very similar to those of the allied species. Mr. Ridgway 
observes :—“ In its manner of flight, which is gliding and noiseless, this Thrush greatly resembles 
Townsend's Solitaire (Myiadestes townsendi), the resemblance being increased by the pale ochraceous 
band across the base of the remiges, which shows as a very conspicuous feature on both birds, 
when flying. Тһе haunts of this Thrush were so difficult of access from our camp, and its manners 
so reserved, that we could not learn much regarding its habits, nor did we hear its song." 
Mr. Mearns (Auk, vii. p. 263) in his paper on * Arizona Mountain Birds,” writes :—“ This, the 
sweetest mountain songster, is an abundant summer resident in fir and spruce forests, breeding late 
in May and in June. At Quaking Asp Settlement, near the end of May, a pair was engaged in 
building a nest in my camp. The nest was saddled on to the middle of the lowest limb of a large 
spruce, and the birds gathered material for its construction close about my tent with perfect freedom 
from shyness, accepting proffered bits of cotton for its completion. Like the Wood-Thrush, its 
song is most frequent in the early morning hours and after showers. The form wintering in the 
Verde Valley is the Dwarf Hermit-Thrush (Zurdus aonalaschke).” 
Mr. Williams (Auk, vii. p. 292), writing from Montana, says :—“ Audubon's Thrush, according 
to my observations, is much the rarest, in Montana, of the birds under consideration. It reaches a 
somewhat higher elevation than the Willow and Olive-backed Thrushes, and I have seen it at least 
half a mile from streams in dense evergreen timber. Тһе first specimen noted was in the top of a 
pine sixty or seventy feet high, standing on a projecting knoll of the mountain side some eight 
hundred or a thousand feet above Belt River. 1 was first attracted by the song, at that time quite 
new to me, and shortly discovered and obtained the bird. Their song begins with two (sometimes 
only one) clear, whistle-like notes of slightly ditferent pitch, followed by the ringing melody peculiar 
to the songs of the other species, and the whole, though rather too brief, produces a fine effect as it 
comes floating, clear and distinct, from the silent dark-timbered mountain-sides, They sing at 
irregular intervals throughout the day, and never seem to collect together in any numbers, certainly 
manifesting some very hermit-like traits." | 
T. auduboni is a larger race than either T. pallasi or T. aonalaschke, and is of a darker, somewhat 
greyer, brown, while the tail is of a dull reddish-brown. The sides of the body are dark ashy or 
ochraceous-grey, and the under wing-coverts are pale buff or whitish, as in 7. pallasi; the axillaries 
are dark ashy, like the flanks, but with white bases. 
Adult male. Total length 6:8 inches, culmen 0°65, wing 4:1, tail 2°85, tarsus 1:25. 
Adult female. Total length 6-4 inches, wing 3:7. 
The figure in the Plate representing this species is drawn from a specimen from La Parada 
in the Seebohm Collection. [R. B. 5.) 
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